CHEM Change
T/F example of a chemical change is…
Melting, flammability, acidity, and combustion
T/F a physical change is hard to reverse?
False
T/F Flammability is a physical change?
False or No
T/F density is a physical prperty
True
What form of matter is water?
Liquid
T/F a chemical change is easily reversed?
False
What is an example of a physical change?
Evaporation, ice melting, sugar dissolving, etc.
The ability to explode?
Combustion
What properties stay during physical changes?
Freezing and boiling point, smell and taste
What are the 3 forms of matter
Solid, liquid, gas
The rims of my car are rusted, what change is that?
Chemical change
I dropped my wine glass and it shattered, what change is that?
Physical
List 2 non Chemical properties.
Color,Smell,taste,feel
Is boiling/ freezing point chemical or physical property
Physical property
What are two types of mixtures
Hetero/homogeneous
What change is this?(milk souring/spoiling)
Chemical
What characteristic best describes what happened during a physical change? A: composition changes B:composition stays the same C: form stays the same D:mass is lost
B: composition stays the ssame
Define and chemical property
Indicates how something will react with another substance.
Define physical properties
Properties that can be observed without being altered
What type of pure substance is CO2
Compound
Define chemical change
Change of materials into another material with different properties. And one or more new substances.
What property stays the same during chemical and physical change?
Mass
What is the difference between a chemical and physical property?
Physical can be observed without changing the identity of a substance. For chemical you have the change the chemical identity to see it.
Are there physical properties in chemical changes?
Color, smell, taste, etc.
Define mixtures
Two or more pure substances physaicalls mixed toghether